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EP0914915A4 - Underwater cutting pelletizer, knife used for the same pelletizer, and underwater cutting pelletization method using the same knife - Google Patents

Underwater cutting pelletizer, knife used for the same pelletizer, and underwater cutting pelletization method using the same knife

Info

Publication number
EP0914915A4
EP0914915A4 EP98905727A EP98905727A EP0914915A4 EP 0914915 A4 EP0914915 A4 EP 0914915A4 EP 98905727 A EP98905727 A EP 98905727A EP 98905727 A EP98905727 A EP 98905727A EP 0914915 A4 EP0914915 A4 EP 0914915A4
Authority
EP
European Patent Office
Prior art keywords
knife
pelletizer
same
underwater cutting
die
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98905727A
Other languages
German (de)
French (fr)
Other versions
EP0914915A1 (en
EP0914915B1 (en
Inventor
Shigehiro Kasai
Katsunori Takahashi
Tatsuya Tanaka
Yoshinori Kuroda
Masahiko Kashiwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of EP0914915A1 publication Critical patent/EP0914915A1/en
Publication of EP0914915A4 publication Critical patent/EP0914915A4/en
Application granted granted Critical
Publication of EP0914915B1 publication Critical patent/EP0914915B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A knife used for an underwater cutting pelletizer adapted to pelletize a molten resin, which is forced out from a die into a water chamber, by cutting the molten resin with a cutter having the knife rotated in a die-opposed state, the knife of the cutter being provided on the side thereof which is opposite to the die-facing side thereof with a mountain-shaped guide surface for guiding a water current in the direction in which the water current is drawn toward the die. More concretely, let B° and D° equal a transition angle from a front surface to an upper surface of the knife and a transition angle from the upper surface to a rear surface thereof respectively. The knife surface is set so as to satisfy the expression 150°≤(B+D)/2≤180°. Let A and C equal to a maximum distance between a cutter surface and an inner surface and a maximum thickness of the knife respectively. The maximum thickness of the knife is set so as to satisfy the expression C≤1.2A.
EP98905727A 1997-03-04 1998-03-02 Underwater cutting pelletizer, knife used for the same pelletizer, and underwater cutting pelletization method using the same knife Expired - Lifetime EP0914915B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6743297 1997-03-04
JP67432/97 1997-03-04
PCT/JP1998/000856 WO1998039147A1 (en) 1997-03-04 1998-03-02 Underwater cutting pelletizer, knife used for the same pelletizer, and underwater cutting pelletization method using the same knife

Publications (3)

Publication Number Publication Date
EP0914915A1 EP0914915A1 (en) 1999-05-12
EP0914915A4 true EP0914915A4 (en) 2002-01-02
EP0914915B1 EP0914915B1 (en) 2008-12-31

Family

ID=13344757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98905727A Expired - Lifetime EP0914915B1 (en) 1997-03-04 1998-03-02 Underwater cutting pelletizer, knife used for the same pelletizer, and underwater cutting pelletization method using the same knife

Country Status (5)

Country Link
US (1) US6174475B1 (en)
EP (1) EP0914915B1 (en)
JP (1) JP2905472B2 (en)
DE (1) DE69840402D1 (en)
WO (1) WO1998039147A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3365735B2 (en) 1998-01-14 2003-01-14 株式会社神戸製鋼所 Underwater cutting granulator
AT410072B (en) * 2001-06-08 2003-01-27 Erema METHOD AND DEVICE FOR ADJUSTING THE PRELOADING OF THE KNIVES OF A GRANULATING DEVICE
US6848639B2 (en) * 2002-02-12 2005-02-01 Borsig Gmbh Low turbulent flow high speed cutter knife
US7318719B2 (en) 2004-04-01 2008-01-15 Gala Industries, Inc. Steep angle cutter hub and blade assembly
US7267540B2 (en) * 2006-01-26 2007-09-11 Gala Industries, Inc. Steep angle cutter hub with blunt edge blades
JP2008238751A (en) * 2007-03-28 2008-10-09 Fujifilm Corp Manufacturing method of pellet aggregate
DE102009032993A1 (en) 2009-07-14 2011-01-20 Automatik Plastics Machinery Gmbh Device for granulating thermoplastic plastic material leaving from nozzles in cutting surface, comprises cutting surface, which is assigned knife arrangement with knife supporting area supporting knife arranged on knife driving shaft
JP5552308B2 (en) * 2009-12-16 2014-07-16 積水化成品工業株式会社 Production apparatus and production method for thermoplastic resin particles
JP5564010B2 (en) * 2011-05-30 2014-07-30 株式会社日本製鋼所 Cutter blade and pellet manufacturing apparatus of pellet manufacturing apparatus

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR919261A (en) * 1945-12-21 1947-03-04 Du Pont Process for the production of molding materials in the divided state and resulting product
US3670467A (en) * 1970-04-27 1972-06-20 Robert H Walker Method and apparatus for manufacturing tumbling media
US4123207A (en) * 1976-03-29 1978-10-31 Gala Industries, Inc. Underwater pelletizer and heat exchanger die plate
US4179255A (en) * 1978-03-13 1979-12-18 E. I. Du Pont De Nemours And Company Melt cutter apparatus
US4569810A (en) * 1983-07-06 1986-02-11 Atochem Apparatus and methods for immersed-head cutting of thermoplastics
FR2659250A1 (en) * 1990-03-09 1991-09-13 Appryl Snc Cutter for equipping a cutting head of a granulating machine, and granulating machine
US5052911A (en) * 1989-04-27 1991-10-01 Mikeska Olvin J Underwater pelletizer blade
WO1996033853A1 (en) * 1995-04-28 1996-10-31 Shell Oil Company Underwater pelletizer
JPH0957745A (en) * 1995-08-29 1997-03-04 Kobe Steel Ltd Pelletizer
US5698150A (en) * 1995-06-07 1997-12-16 Acushnet Company Method for injection molding balata golf ball covers

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1350012A (en) * 1970-12-28 1974-04-18 Barmag Barmer Maschf Extrusion die for granulators
JPS61105114U (en) * 1984-12-15 1986-07-04
DE3532937A1 (en) * 1985-09-14 1987-04-02 Werner & Pfleiderer HOLE PLATE FOR UNDERWATER PELLETIZATION OF PLASTIC STRINGS
JPH0645136B2 (en) * 1990-03-09 1994-06-15 株式会社神戸製鋼所 Underwater cutting device
JPH0740112U (en) * 1993-12-27 1995-07-18 株式会社神戸製鋼所 Pelletizer
DE4425004A1 (en) * 1994-07-15 1996-01-18 Werner & Pfleiderer Process for producing a nozzle plate with an intermediate layer embedded between the base body and the cutting body
EP0735077B1 (en) * 1995-03-27 1998-07-29 BASF Aktiengesellschaft Process for producing thermoplastic resin
US5611983A (en) * 1995-04-28 1997-03-18 Shell Oil Company Process for pelletizing polymer
JP2989122B2 (en) * 1995-06-13 1999-12-13 株式会社日本製鋼所 Method and apparatus for extrusion granulation of synthetic resin

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR919261A (en) * 1945-12-21 1947-03-04 Du Pont Process for the production of molding materials in the divided state and resulting product
US3670467A (en) * 1970-04-27 1972-06-20 Robert H Walker Method and apparatus for manufacturing tumbling media
US4123207A (en) * 1976-03-29 1978-10-31 Gala Industries, Inc. Underwater pelletizer and heat exchanger die plate
US4179255A (en) * 1978-03-13 1979-12-18 E. I. Du Pont De Nemours And Company Melt cutter apparatus
US4569810A (en) * 1983-07-06 1986-02-11 Atochem Apparatus and methods for immersed-head cutting of thermoplastics
US5052911A (en) * 1989-04-27 1991-10-01 Mikeska Olvin J Underwater pelletizer blade
FR2659250A1 (en) * 1990-03-09 1991-09-13 Appryl Snc Cutter for equipping a cutting head of a granulating machine, and granulating machine
WO1996033853A1 (en) * 1995-04-28 1996-10-31 Shell Oil Company Underwater pelletizer
US5698150A (en) * 1995-06-07 1997-12-16 Acushnet Company Method for injection molding balata golf ball covers
JPH0957745A (en) * 1995-08-29 1997-03-04 Kobe Steel Ltd Pelletizer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) *
See also references of WO9839147A1 *

Also Published As

Publication number Publication date
EP0914915A1 (en) 1999-05-12
US6174475B1 (en) 2001-01-16
JPH10305425A (en) 1998-11-17
JP2905472B2 (en) 1999-06-14
DE69840402D1 (en) 2009-02-12
WO1998039147A1 (en) 1998-09-11
EP0914915B1 (en) 2008-12-31

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